Driver arrangement for stylus lifting/lowering apparatus

Abstract

In a disc record player of the type which includes a turntable for rotatably supporting the disc record, a signal pickup device for recovering information signals from the disc, an elongated arm having the pickup stylus connected at one end and the other end coupled to the player, there is provided a selective stylus arm translating apparatus for moving the pickup arm toward and away from the disc record. The selective translating apparatus includes apparatus responsive to a player control signal for translating the stylus arm at a first rate and also comprises apparatus which is responsive to a condition of a signal recovered from the disc for translating the arm at a second rate.

What is claimed is: 
     
       1. In apparatus for use with a disc record, said apparatus being of the type comprising: a turntable for rotatably supporting said disc record, said disc record having signals recorded thereon; a signal pickup device for recovering said signals from said disc record; and means for selectively translating said arm whereby said pickup device may be selectively made to engage and disengage said disc record, said selective translating means comprising: means responsive to an apparatus control signal for translating said pickup device at a first rate; and   means responsive to a condition of a given signal recovered from said disc record for translating said pickup device at a second rate.   
     
     
       2. The disc record player according to claim 1 wherein said given recovered signal comprises a modulated carrier wave. 
     
     
       3. In a video disc player of the type comprising: a turntable for rotatably supporting a disc record, said disc record having information signals recorded thereon; a signal pickup stylus for recovering said information signals during playback; and an elongated arm having said stylus connected at one end thereof, the other end of said arm being coupled to said player, the apparatus comprising: an electromagnetic actuator including a coil for generating a magnetic field when energized, an element arranged to move in response to the generation of said magnetic field, and a stylus arm rest connected to said element and adapted to receive said stylus arm, said stylus arm rest being biased to a rest position to prevent engagement of said stylus with said record in the absence of said magnetic field;   driver means connected to said coil for providing ramp signals in response to signals provided thereto;   combiner means having an output terminal connected to said driver means and having first and second input terminals;   means for coupling a player control signal to one input terminal of said combiner means whereby said driver means provides a first ramp signal having a first slope for translating said stylus arm rest in a plane perpendicular to said record at a first rate; and     means for coupling a signal derived from said record to the other input terminal of said combiner means whereby said driver means provides a second ramp signal having a second slope for translating said stylus arm rest in said plane at a second rate in response to a condition of said derived signal.   
     
     
       4. The apparatus according to claim 3 wherein said signal derived from said record comprises a modulated carrier wave. 
     
     
       5. The apparatus according to claim 3 wherein said signal derived from said record comprises an automatic frequency tracking signal. 
     
     
       6. The apparatus according to claim 3 wherein said stylus arm rest is translated toward said record at a first rate during the presence of only said control signal and at said second rate during the presence of said control signal and said derived signal. 
     
     
       7. The apparatus according to claim 3 wherein said stylus arm rest is translated in a direction away from said record toward said rest position at one rate after the termination of said control signal and at a second rate after the termination of said control signal and said derived signal.